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    • 1. 发明授权
    • Self-aligned array contact for memory cells
    • 用于存储单元的自对准阵列触点
    • US06870211B1
    • 2005-03-22
    • US10605590
    • 2003-10-10
    • Rama DivakaruniJohnathan E. FaltermeierMichael MaldeiJay Strane
    • Rama DivakaruniJohnathan E. FaltermeierMichael MaldeiJay Strane
    • H01L21/60H01L21/8242H01L27/108
    • H01L21/76897H01L27/10885H01L27/10888H01L27/10894H01L27/10897
    • A method of forming bitlines for a memory cell array of an integrated circuit and conductive lines interconnecting transistors of an external region outside of the memory cell array is provided. The method includes patterning troughs in a dielectric region covering the memory cell array according to a first critical dimension mask. Bitline contacts to a substrate and bitlines are formed in the troughs. Thereafter, conductive lines are formed which consist essentially of at least one material selected from the group consisting of metals and conductive compounds of metals in horizontally oriented patterns patterned by a second critical dimension mask, wherein the conductive lines interconnect the bitlines to transistors of external circuitry outside of the memory cell array, the conductive lines being interconnected to the bitlines only at peripheral edges of the memory cell array.
    • 提供一种形成集成电路的存储单元阵列的位线的方法和将存储单元阵列外部的外部区域的晶体管互连的导线。 该方法包括根据第一临界尺寸掩模在覆盖存储单元阵列的电介质区域中图形化槽。 在槽中形成与基板和位线的位线接触。 此后,形成导线,其基本上由选自金属的金属和由第二关键尺寸掩模图案化的水平定向图案中的金属导电化合物组成的组中的至少一种材料组成,其中导线将位线互连到外部电路的晶体管 在存储单元阵列外部,导线仅在存储单元阵列的外围边缘处互连到位线。